Search results for "Improved method"

Improved Method for Orbital Elements Differential Correction.

1990

As was pointed out by IAU in 1976, an important problem in fundamental astronomy is the improvement of the vernal equinox and equator positions. To this aim, it is necessary to know the accurate values of minor planets orbital elements. The classical methods of orbital elements differential corrections are based on linking the observations at different epochs considering equal derivatives respect to the initial and osculating elements. In this paper we present an improved method in which the least squares matrix coefficients is calculated from the integration of the Lagrange planetary equations and its derivatives.

Were the chaotic ELMs in TCV the result of an ARMA process?

2004

The results of a previous paper claiming the demonstration that edge localized mode (ELM) dynamics on TCV are chaotic in a number of cases has recently been called into question, because the statistical test employed was found to also identify linear auto regressive—moving average (ARMA) models as chaotic. The TCV ELM data has therefore been re-examined with an improved method that is able to make this distinction, and the ARMA model is found to be an inappropriate description of the dynamics on TCV. The hypothesis that ELM dynamics are chaotic on TCV in a number of cases is therefore still favoured.

Improved method for quantitative analysis of vitamin K1i and vitamin K1 2,3-epoxide in human plasma by electron-capture gas-liquid capillary chromato…

1984

C57BL/6-specific conditions for efficient in utero electroporation of the central nervous system.

2014

Abstract Background In utero electroporation is a fast an efficient tool to specifically address gene expression in the murine central nervous system. This technique was originally established in ICR/CD-1 outbred mice. Neuroanatomical differences between the different mouse strains and variations in gestation length require the optimization of the conditions for each strain to avoid severe complications. Furthermore the relevant position information is currently only scarcely standardized and not always easy to transfer to C57BL/6 mice. New method In this study we present an improved method for in utero electroporation of C57BL/6 including a detailed atlas that allows for specific and effic…

A non-destructive X-ray microtomography approach for measuring fibre length in short-fibre composites

2012

An improved method based on X-ray microtomography is developed for estimating fibre length distribution of short-fibre composite materials. In particular, a new method is proposed for correcting th ...

Methodisches zur bestimmung der molekulargewichtsverteilung von cellulosen

1959

Es wird eine verbesserte Fallungs-Fraktioniermethode zur Ermittlung von Molekulargewichtsverteilungen an Cellulosenitraten beschrieben. Es konnen mit ihr gut reproduzierbare Verteilungskurven erhalten werden, wenn man die notwendigen Bedingungen wie gleichmasige Substitution des Praparates, moglichst kleine Ausgangskonzentration zur Erreichung eines guten Trenneffektes, Vermeidung eines Abbaues wahrend der Fraktionierung usw. in genugender Weise beachtet, – Zur Auswertung der Fraktionierergebnisse raumlich inhomogener Praparate (wie z. B. merzerisierte und oxydativ abgebaute Baumwollen) wird ein statistisches Verfahren vorgeschlagen. An improved method of preciptation fractionation for dete…

Peltier effect-based temperature challenge: an improved method for diagnosing cold urticaria.

2004

Improved method for cannula fixation for long-term intracerebral brain infusion

2017

Abstract Background Implanted osmotic minipumps are commonly used for long-term, brain-targeted delivery of a wide range of experimental agents by being connected to a catheter and a cannula. During the stereotactical surgery procedure, the cannula has to be placed correctly in the x-y directions and also with respect to the injection point in the z-direction (deepness). However, the flat fixation base of available cannula holders doesn’t allow an easy, secure fixation onto the curve-shaped skull. New method We have developed a modified method for a better fixation of the cannula holder by using an easy-to-produce, skull-shaped silicone spacer as fixation adapter. Results We describe the ap…

Development of an improved method for trace analysis of quinolones in eggs of laying hens and wildlife species using molecularly imprinted polymers.

2012

A sensitive, selective, and efficient method was developed for simultaneous determination of 11 fluoroquinolones (FQs), ciprofloxacin, danofloxacin, difloxacin, enrofloxacin, flumequine, marbofloxacin, norfloxacin, ofloxacin, oxolinic acid, pipemidic acid, and sarafloxacin, in eggs by molecularly imprinted polymer (MIP) and column liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS). Samples were diluted with 50 mM sodium dihydrogen phosphate at pH 7.4, followed by purification with a commercial MIP (SupelMIP SPE-Fluoroquinolones). Recoveries for the 11 quinolones were in the range of 90-106% with intra- and interday relative standard deviation ranging from …

Improved method of manufacturing carbon nanotube infused multifunctional 3D woven composites

2021

This research work aimed to develop smart multifunctional composites via a process for uniformly dispersing carbon nanotubes (CNT) on an orthogonal three-dimensional (3D) woven glass fabric with minimised filtering effect. These smart composites could detect strain under tensile and flexural loading by the piezoresistive response of the infused CNT network. Conventional vacuum assisted resin transfer moulding was modified to control the infusion of 0.25 wt% CNT on the 3D woven glass fabric by varying the vacuum pressure. Results showed that at 101.3 kPa vacuum pressure, the CNT percolated through the thickness of the orthogonal 3D woven glass fabric while being marginally filtered by the f…